The function modules and screens of function group XLFX provide user exits and screen exits for maintaining customer-specific fields at header and item level.

Screen areas

If you use the enhancement, you must create and generate the following
screens (even if the screens themselves are not used):

SAPLXLFX 0200 Subscreen: Additional data, entry, single documents

SAPLXLFX 0220 Subscreen: Additional data, header, details

SAPLXLFX 0230 Subscreen: Additional data, item, details

SAPLXLFX 0320 Subscreen: Additional data, list entry

SAPLXLFX 0510 Subscreen: Additional data, header, list entry

You must flag all the screens as subscreens. They do not need to contain fields but they must exist to avoid program termination.

Function exits

The screens are linked with the standard program via function modules. Some function modules provide data for the subscreen (export), and some function modules collect data from the subscreen (import).